SH330M250ST Equivalent & Substitute Parts Reference

Part Overview

The SH330M250ST is a 33 µF, 250 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, with 762 pieces currently in stock. The SH series represents a legacy product line that has been superseded by active alternatives. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for systems utilizing this capacitor specification.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	33	µF	Critical - must match exactly
Voltage Rating	250	V	Critical - must match or exceed
Tolerance	±20%	%	Critical - must match or be tighter
Lead Spacing	5.00	mm	Critical - PCB footprint compatibility
Package Type	Radial, Can	-	Critical - mechanical fit
Mounting Type	Through Hole	-	Critical - assembly compatibility
Operating Temperature Range	-25°C to 105°C	°C	Important - thermal environment compatibility
Lifetime @ 105°C	2000	Hrs	Important - reliability and longevity
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the SH330M250ST are qualified based on the following criteria:

Mandatory Matching Parameters:

Capacitance: 33 µF (exact match required)
Voltage Rating: 250 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 5.00 mm (0.197 inches)
Package Type: Radial, Can
Mounting Type: Through Hole
Polarization: Polar

Compatible Variation Parameters:

Operating Temperature Range: Minimum -25°C to 105°C (substitutes may extend lower temperature capability)
Lifetime @ 105°C: 2000 hours or greater (longer lifetime acceptable)
ESR (Equivalent Series Resistance): Variation acceptable if not specified as critical in application
Ripple Current Ratings: Variation acceptable if application requirements are met
Physical Dimensions (diameter and height): Minor variations acceptable within PCB clearance constraints
RoHS Status: ROHS3 Compliant required for regulatory alignment

All substitute parts listed maintain identical electrical specifications for capacitance, voltage, and tolerance while offering improved or equivalent reliability characteristics through extended lifetime ratings or enhanced ripple current handling.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance (%)	Lifetime @ 105°C (Hrs)	Operating Temp (°C)	Lead Spacing (mm)	Diameter (mm)	Height (mm)	Product Status	RoHS
SH330M250ST	Cornell Dubilier Electronics	SH	33	250	±20	2000	-25 to 105	5.00	13.00	25.00	Obsolete	ROHS3
SEK330M250ST	Cornell Dubilier Electronics	SEK	33	250	±20	2000	-40 to 105	5.00	13.00	21.00	Active	ROHS3
250BXC33MEFC12.5X16	Rubycon	BXC	33	250	±20	12000	-25 to 105	5.00	12.50	18.00	Active	ROHS3
250BXC33MEFC12.5X20	Rubycon	BXC	33	250	±20	12000	-25 to 105	5.00	12.50	22.00	Active	ROHS3
250CFX33M12.5X20	Rubycon	CFX	33	250	±20	5000	-25 to 105	5.00	12.50	22.00	Active	ROHS3
250CFX33MEFC12.5X20	Rubycon	CFX	33	250	±20	5000	-25 to 105	5.00	12.50	22.00	Active	ROHS3
336CKE250M	Cornell Dubilier / Illinois Capacitor	CKE	33	250	±20	2000	-25 to 105	5.00	12.50	21.50	Active	ROHS3
EEU-EB2E330	Panasonic Electronic Components	EB-A	33	250	±20	5000	-25 to 105	5.00	12.50	22.00	Active	ROHS3
EEU-ED2E330	Panasonic Electronic Components	ED-A	33	250	±20	10000	-25 to 105	5.00	12.50	20.00	Active	ROHS3
EEU-EE2E330	Panasonic Electronic Components	EE-A	33	250	±20	10000	-25 to 105	5.00	12.50	22.00	Active	ROHS3

Engineering Selection Recommendations

Primary Upgrade Path:

The SEK330M250ST (Cornell Dubilier Electronics, Active status) represents the direct manufacturer upgrade from the obsolete SH330M250ST. Both components share identical electrical specifications (33 µF, 250 V, ±20% tolerance, 2000 Hrs @ 105°C) and are manufactured by the same supplier. The SEK series offers extended lower operating temperature capability (-40°C versus -25°C) and reduced physical height (21.00 mm versus 25.00 mm), providing improved thermal performance and potential PCB space optimization. ROHS3 compliance is maintained.

Extended Lifetime Alternatives:

For applications requiring enhanced reliability and extended service life, the following active components provide 5000 to 12000 hour lifetimes at 105°C:

Rubycon BXC Series (250BXC33MEFC12.5X20): 12000 hour lifetime, compact 12.50 mm diameter, 22.00 mm height. Suitable for space-constrained designs requiring maximum reliability.
Rubycon CFX Series (250CFX33M12.5X20, 250CFX33MEFC12.5X20): 5000 hour lifetime, 12.50 mm diameter, 22.00 mm height. Intermediate reliability option with active product status.
Panasonic EEU-ED2E330 (ED-A Series): 10000 hour lifetime, compact 20.00 mm height, 12.50 mm diameter. Highest reliability among Panasonic options with extended service life.
Panasonic EEU-EE2E330 (EE-A Series): 10000 hour lifetime, 22.00 mm height, enhanced ripple current handling (995 mA @ 100 kHz).

Equivalent Reliability Option:

The 336CKE250M (Cornell Dubilier / Illinois Capacitor, CKE Series) maintains identical 2000 hour lifetime and electrical specifications while offering active product status and compact 12.50 mm diameter packaging.

Selection Criteria:

Space Constraints: SEK330M250ST (21.00 mm height) or EEU-ED2E330 (20.00 mm height)
Maximum Reliability: 250BXC33MEFC12.5X20 (12000 hours) or EEU-ED2E330 / EEU-EE2E330 (10000 hours)
Direct Manufacturer Continuity: SEK330M250ST (Cornell Dubilier)
Multi-Source Availability: Panasonic EEU series or Rubycon BXC/CFX series

All listed substitutes maintain ROHS3 compliance and are currently in active production status, ensuring long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q1: Can the SH330M250ST be directly replaced with the SEK330M250ST?

A: Yes. Both components are manufactured by Cornell Dubilier Electronics and share identical electrical specifications: 33 µF capacitance, 250 V voltage rating, ±20% tolerance, and 2000 hour lifetime at 105°C. The SEK series is the active product line successor. Physical dimensions differ slightly (SEK height is 21.00 mm versus SH height of 25.00 mm), but both maintain 5.00 mm lead spacing for standard PCB footprints. Verify PCB clearance above the capacitor location to confirm the reduced height is compatible.

Q2: What is the primary difference between the Rubycon BXC and CFX series substitutes?

A: The primary difference is lifetime rating. Rubycon BXC series (250BXC33MEFC12.5X20) provides 12000 hours at 105°C, while the CFX series (250CFX33M12.5X20, 250CFX33MEFC12.5X20) provides 5000 hours at 105°C. Both series maintain identical 33 µF, 250 V, ±20% specifications and 5.00 mm lead spacing. The BXC series is recommended for applications requiring extended service life or operating in high-temperature environments. Physical dimensions are identical between both series (12.50 mm diameter, 22.00 mm height).

Q3: How do Panasonic EEU-ED2E330 and EEU-EE2E330 differ?

A: Both Panasonic components provide 10000 hour lifetime at 105°C and identical electrical specifications (33 µF, 250 V, ±20%). The primary differences are physical height and ripple current handling. The EEU-ED2E330 has a more compact 20.00 mm height, while the EEU-EE2E330 is 22.00 mm tall. The EEU-EE2E330 provides superior ripple current capability (995 mA @ 100 kHz versus 710 mA @ 100 kHz for the ED variant). Select the ED variant for space-constrained applications; select the EE variant for high ripple current environments.

Q4: Are all substitute parts compatible with the original SH330M250ST PCB footprint?

A: All substitute parts maintain the critical 5.00 mm lead spacing, ensuring compatibility with standard through-hole PCB footprints designed for the SH330M250ST. However, physical diameter and height vary across substitutes. The original SH330M250ST has 13.00 mm diameter and 25.00 mm height. Substitutes range from 12.50 mm diameter (Rubycon and Panasonic) to 13.00 mm (SEK330M250ST), and heights from 18.00 mm to 25.00 mm. Verify PCB clearance constraints, particularly above the capacitor location and adjacent component spacing, before selecting a substitute with different physical dimensions.

Q5: Which substitute offers the best balance of reliability and compact size?

A: The EEU-ED2E330 (Panasonic ED-A Series) provides optimal balance. It delivers 10000 hour lifetime at 105°C (5 times longer than the original SH330M250ST), maintains the most compact height at 20.00 mm, and preserves all electrical specifications (33 µF, 250 V, ±20%). This component is suitable for applications where both space optimization and extended service life are priorities.

Q6: What does the "MEFC" designation in Rubycon part numbers indicate?

A: The "MEFC" designation in Rubycon part numbers (250BXC33MEFC12.5X20, 250CFX33MEFC12.5X20) indicates the component includes a safety vent feature and specific construction characteristics. This designation does not affect electrical compatibility with the SH330M250ST. Both MEFC and non-MEFC variants of the same series (e.g., 250CFX33M12.5X20 versus 250CFX33MEFC12.5X20) maintain identical capacitance, voltage, tolerance, and lead spacing specifications.

Q7: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, matching the regulatory status of the original SH330M250ST. This ensures compatibility with modern manufacturing standards and environmental regulations across all listed alternatives.

Q8: Can substitutes with higher lifetime ratings (5000, 10000, or 12000 hours) be used in applications originally designed for 2000 hour components?

A: Yes. Higher lifetime ratings indicate extended reliability and durability. A component rated for 10000 hours at 105°C will perform satisfactorily in applications originally specified for 2000 hour components. The extended lifetime provides additional design margin and improved long-term reliability. No electrical or mechanical incompatibility exists when upgrading to higher lifetime ratings, provided all other parameters (capacitance, voltage, tolerance, lead spacing, package type) remain identical.

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